How many g of mg are present in a sample that contains 8.9x10^24 atoms of mg?

Sulfuric acid is a polyprotic acid. write balanced chemical equations for the sequence of reactions that sulfuric acid can undergo when it's dissolved in water.

Which type of intermolecular attractions holds ammonia molecules together with other ammonia molecules?

Hno2 + caco3 = h2co3 + ca(no2) can someone balance this